GMB 550-8040 Fuel Pump Failures: I have contacted and am now working with GMB of North America;  in an attempt to identify the issue of infant mortality aka premature failure on their mechanical fuel pumps for our Z's. The issue has been widely discussed over the past couple years on different Z Car Forums and Face Book Pages.    GMB Product Management has ask me if we could return 3 or 4 of these failed fuel pumps directly to them, so they can attempt to identify the problem. If you